@article{MZ_1956__66_169626,
     author = {Helmut Schaefer},
     title = {\"Uber singul\"are {Integralgleichungen} und eine {Klasse} von {Homomorphismen} in lokalkonvexen {R\"aumen.}},
     journal = {Mathematische Zeitschrift},
     pages = {147--163},
     publisher = {mathdoc},
     volume = {66},
     year = {1956},
     zbl = {0073.32502},
     url = {http://geodesic.mathdoc.fr/item/MZ_1956__66_169626/}
}